noun
: a long tube that reaches to the sea bottom and that is so equipped mechanically that a man within it may perform work on objects outside (as for salvaging purposes)
noun
: a long tube that reaches to the sea bottom and that is so equipped mechanically that a man within it may perform work on objects outside (as for salvaging purposes)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012